Indoor Fan Control - Fujitsu R410A Service Instruction

5. INDOOR FAN CONTROL

1. Fan speed
( Table 4 : Indoor fan speed )
Operation mode
Heating
Cooling/ Fan
Dry
2. FAN OPERATION
The airflow can be switched in 5 steps such as AUTO, QUIET, LOW, MED, HIGH,
while the indoor fan only runs.
When Fan mode is set at (Auto), it operates on (MED) Fan Speed.
3. COOLING OPERATION
Switch the airflow [AUTO], and the indoor fan motor will run according to a room temperature,
as shown in Fig. 3.
On the other hand, if switched in [HIGH] ~ [QUIET], the indoor motor will run at a constant
airflow of [COOL] operation modes QUIET, LOW, MED, HIGH,as shown in Table 4.
( Fig. 3 : Airflow change - over ( Cooling : AUTO ) )
TR-Ts > 4°F
(2°C)
4°F > TR-Ts > 2°F
=
(2°C)
2°F > TR-Ts
(1°C)
Air flow mode
ASU18RLF
Hi 1260
Me+
1120
Me
1020
Lo
Quiet
Cool air prevention
S-Lo
Hi
1260
Me
1020
Lo
Quiet
X zone : 770
J zone : 720
HIGH mode
MED mode
(1°C)
LOW mode
When the room
temperature drops
Speed (rpm)
ASU24RLF
1530
1320
1220
900 1020
790 900
680 720
270 270
1480
1220
900 1020
770 900
X zone : 900
J zone : 850
TR-Ts > 5°F
=
(2.5°C)
5°F > TR-Ts > 3°F
(2.5°C)
3°F > TR-Ts
(1.5°C)
When the room
temperature rises
01-04
=
(1.5°C)
TR : Room temperature
Ts : Setting temperature